Antifriction-bearing.



HENRY HESS, OF WAWA, PENNSYLVANIA.

ANTIFR'ICTION-BEARING.

Specification o! Lettera Patent.

Patented Aug. 3, 1909.

Application led November 30, 1908. Serial No. 465,085.

To all whom 'it may concern:

Be it known that I, HENRY Hess, a citizen of the United States, residing at Wawa, in the county of Delaware and State of Pennsylvania, have invented certain new and useful .Im rovements in Antifriction-Bearings, of

which the following is a speciiication, reference being had therein to the accompanying drawing.

This invention relates to mountings for antifriction bearings, and has reference more particularly to a device for firmly securing the bearing to its support. Devices for this purpose have been constructed in the form of a contractile conical bushing encircling the shaft or support, and provided at one end with screw threads to receive a nut, the bushing being in turn encircled by the inner casing element ol the bearing, the bore of which is coned to liit the bushing, so that by screwing the nut up against the casin element, the latter is forced u the incline o the bushing and acts to bin the latter on the shait and eii'ect a firm and rigid connection of the parts. Such a construction is disclosed in a patent issued to me on the 23rd day of April, 1907, No. 851,419.

it is the aim of the present invention to avoid the necessity of forming the core of the casing element oi the bearing, conical, as was the case in the construction referred to, and to adapt the device for use in connection with bearings in which the bore of the casing element is straight, or truly cylindrical, andthe invention consists in combining with a contractile bushing adapted to encircle the4 shaft or support, and having its exterior surtace' coned or inclined, an expansible bushin encircling the saine and formed with a conica bore and cylindrical exterior, said expansible bushing bein Athreaded at one end, a nut en circling the t readed end of the bushin and adapted to engage the contractile bus ing, and an anti-friction bearing including` an inner casing element encircling the expansible bushing; whereby when the nut is screwed up, it will, by en aging the contractile bushing, move the ot er bushing along the conical surface of the contractile bushing, thereby contracting the latter on the shaft and expanding the former within the casing element.

The invention consists also in the details of construction and combination Vof parts hereinafter .described and claimed.;y

In the accompanying drawings: Figure 1- is a longitudinal sectional elevation showing a supporting shaft and bearing mounted thereon in accordance with my invention. Fig. 2 is a cross-section on the line -a of the preceding figure. Fig. 3 is a side elevation of the contractile bushing removed. Fig. 4 is a similar view of the expansible bushing removed.

Referring to the drawings:y 1 represents a support in the form of a shaft to which the bearing is to be applied.

2 re resents a contractile bushing encircling t e shaft and provided with an exterior conical sup orting surface 2", and having on one end a ateral annular liange 2b forming an abutment, for the purpose presently described. A i

3 represents an expansible bushing, provided with a conical bore surrounding the supporting surface of the contractile bushing, and having a straight or cylindrical external supporting surface 3 to receive the antifriction bearing, the end of said expansible bushing bein provided With a laterally eX- tending annu ar iiange 3b.

i represents a nut encircling the threaded Harige 3b, and adapted when screwed up thereon to bear against the abutment 2b of the contractile bushing; and @represents the linner casing element of an anti-friction bearing, formed with a straight cylindrical bore to iit the cylindrical surface 3 of the expansible bushing. As a result of this construction and arrangement, it will be seen that when the nut, is screwed up on the threadedv flange oi' the expansible bushing, it `will engage the abutment on the contractile bushiiig and will urge the former along the conicall or inclined supporting surface oi the latter, thereb contracting the bushing 2 on the shaft, an at the same .time slightly expanding the other bushing Within the core of the casing element, with the result that the arts will be clamped firmly together 1n lined relations and hound tightly on the shaft. By reason oi' the fact that the thread forV the nutis lformed in a ilange onthe eirpansible bushing, l ani enabled to make this thread coarse and deep, without enlarging the diameter oi the bushing, which enlargement would necessitate a bearing larger than necessary to support the load to c sustained, and `inasmuch as in the assembling of the parts, the casing element may be passed over the unthreadefi end of the expansilble bush ing, the height of the flange is not limited by the diameter' 'of the 'here of the aging 18'- ment, ras it `would he if the latter had to be Eassed over the threaded end of the bushing, ence the flange may be of any height Within `ti reasonable limits, so that a thread coarse and deep enough may be employed to permit the parts to be bound with the greatest firmness' and rigidity without danger of stripping the thread. Itwill be observed further, that I4 ain enabled to employ, by the construction shown, a bearing in which the casing element which encircles the shaft, is formed with" a v ,f cylindrical or fstraight bore, and at the same time bind the bearing on the shaft by a e therein longitudinal slots extending ironi` one end and terminating" near the opposite `end,

i Q thereby dividing them into segmentalcon nected sections;` or, as `an alternative con#` struction, theslots may be extended entirely `through the bushings, thereby forming separahle segmental sections.A y I prefer to split the nut 4 et, one side and to connect the dividedends by aclampin bolt 6, so thatafter the nut has been screwed I up and "theparts have beenrmly clamped to the shaft at the Ydesired point, `the mit may he prevented from. working loose by tightenrln up the clamping bolt. y y i L desire to beunderstoodthat my inven- 4 tionisy not limited toany specific former ar-` rangement of the partaiexcept in so far as 40' suchliinitations are specified in the claims.`

In order tov permit the contractilebushing n to be assembled within the expansihle bushlng as shown in Fig. 1, the arts of the con4` tractile bushing, separated y the lon 'tudi 4K5 nal slots therein, are forced `together i y ini-` tial compression suciently to permit the end ofthe same to pass throughthebore of Q theexpansible buslijn it being .understood that the width of the's" otsaresuch that suine i i i y hetwo bushings may `e made respec-` tively contractile and expansihle by forming y vsignature in presence to ermit this to be done.` f

cient reductionin diameter maytake' place aving thus described my invention, what, i

I claim and desire to secure by Letters Patent of the United States is asfollows:`-

1. In combination with a support, a contractile conical bushing thereon, an expansible bushing surrounding `the sainel "and formed with a supportingportion having a cylindricalexterior, a nut screwed on the expansible bushing and adapted to engage the other bushing, and an anti-friction bear# ing including an inner casing element. encirclin the supporting portion of the expansiy bley ushing.

2'; In combination with a sup uort, a contractile bushing thereon provide with `a con- 4 ical supporting portion, an annular Harige' or abutment on said bushing, Y an eiqiansible bushing having a supporting portionr formed 'I with a cylindricalouter snrfaceiand a conical bore surrounding Athe, `-ccntractile bushing7 a nut kon "the expansible bushing Aadapted?to bushing.` y i engage said iabntnielit,il and an y anti-friction bearing, including kan` Inner" casing element 3. In combination with a su port, a con f tractile bushing thereonforme with yan eg;- terior conical supportmgsmffacc andencir-` ee r cling the support, an abutment on the endof said bushing, an expansihlebushing formed v with a conical `bore encirclingfthe contractile bushing and having La cylindrical, exterior` supporting portion, an uannularthreaded' flange on the end of the expansible bushing,`

a nut on 4the langeadapted toengage the" ,Y abutment on the cont 1actile bushing, and im i anttfrictionbearin `:ncluding an inner cas# ing element forme with a cylindrical bore encircling the `coquinsible bushing.` y 1 In testimony whereof I have affixed In ofY two witnesses. 

